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LUCKY_DIMON [66]
3 years ago
15

Can somebody help me with this problem. Like asap

Mathematics
1 answer:
denis-greek [22]3 years ago
6 0

Answer:

asap

Step-by-step explanation:

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Joe heard from a reliable source that only 22% of people actually sleep 8 hours or more per night. You do a survey and find 58 o
Juliette [100K]

Answer:

95% Confidence interval:  (31.32%,47.04%)

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 148

Number of people who sleep for 8 hours or longer, x = 58

\hat{p} = \dfrac{x}{n} = \dfrac{58}{148} = 0.3918

95% Confidence interval:

\hat{p}\pm z_{stat}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}

z_{critical}\text{ at}~\alpha_{0.05} = 1.96

Putting the values, we get:

0.3918\pm 1.96(\sqrt{\dfrac{0.3918(1-0.3918)}{148}})\\\\ = 0.3918\pm 0.0786\\\\=(0.3132,0.4704)=(31.32\%,47.04\%)

(31.32%,47.04%)  is the required 95% confidence interval.

8 0
3 years ago
Write the product (4 + i)(4 − i) in the form a + bi. A. 16 − i B. 16 − i2 C. 17 D. 8
bonufazy [111]

Answer:

A.16–i is correct.

Step-by-step explanation:

(4+i)(4–i). [(a+b)(a–b)=(a²–b²)]

(4²–i²)=16–i

I hope this answer is correct so please vote my answer

3 0
3 years ago
Solve this trigonometry question, please by an easy method.​
podryga [215]
  • tan39=6/x
  • x=6/tan39
  • x=7.4

And

  • sin39=6/y
  • y=6/sin39
  • y=9.5
7 0
1 year ago
Read 2 more answers
What is the profit of $ 15
Crazy boy [7]

Answer:15$

Step-by-step explanation:

cuz its profit

8 0
2 years ago
Read 2 more answers
-4(50x-20)=10x+15+23
dlinn [17]

Answer:

0.2 or 1/5

Step-by-step explanation:

-4(50x - 20) = 10x + 15 + 23

-200x + 80 = 10x + 38

80 = 210x + 38

42 = 210x

0.2 = x

Hope this helps! Pls give brainliest!

3 0
3 years ago
Read 2 more answers
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